站长资源网络编程

//加密码时把特殊符号替换成URL可以带的内容
 function urlsafe_b64encode($string) {
  $data = base64_encode($string);
  $data = str_replace(array('+','/','='),array('-','_',''),$data);
  return $data;
 }

 //解密码时把转换后的符号替换特殊符号
 function urlsafe_b64decode($string) {
  $data = str_replace(array('-','_'),array('+','/'),$string);
  $mod4 = strlen($data) % 4;
  if ($mod4) {
   $data .= substr('====', $mod4);
  }
  return base64_decode($data);
 }

 //私钥加密的内容通过公钥可用解密出来
 public function PublicDecrypt($encrypted){
  // $encrypted = $this->urlsafe_b64decode($encrypted);
  $crypto = '';
  foreach (str_split($this->urlsafe_b64decode($encrypted), 128) as $chunk) {
   openssl_public_decrypt($chunk, $decryptData, $this->pu_key);
   $crypto .= $decryptData;
  }
  //openssl_public_decrypt($encrypted,$decrypted,$this->pu_key);//私钥加密的内容通过公钥可用解密出来
  return $crypto;
 }

 //公钥加密
 public function PublicEncrypt($data){
  //openssl_public_encrypt($data,$encrypted,$this->pu_key);//公钥加密
  $crypto = '';
  foreach (str_split($data, 117) as $chunk) {
   openssl_public_encrypt($chunk, $encryptData, $this->pu_key);
   $crypto .= $encryptData;
  }
  $encrypted = $this->urlsafe_b64encode($crypto);
  return $encrypted;
 }

 //私钥解密
 public function PrivateDecrypt($encrypted)
 {
  $crypto = '';
  foreach (str_split($this->urlsafe_b64decode($encrypted), 128) as $chunk) {
   openssl_private_decrypt($chunk, $decryptData, $this->pi_key);
   $crypto .= $decryptData;
  }
  //$encrypted = $this->urlsafe_b64decode($encrypted);
  //openssl_private_decrypt($encrypted,$decrypted,$this->pi_key);
  return $crypto;
 }
}